<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
	</head>
	<body>
		<script>
			let data={a:1};
			let vm=new Vue({
				data:data
			});
			console.info(vm.a==data.a);
			vm.a=2;
			console.info(data.a);
			
			data.a=3;
			console.log(vm.a);
		</script>	
	</body>
</html>
